Websites/app/logical/storage_manager/local.rb

# frozen_string_literal: true

module StorageManager
  class Local
    DEFAULT_PERMISSIONS = 0o644
    attr_reader :base_url, :base_path

    def initialize(base_url:, base_path:)
      @base_url = base_url
      @base_path = base_path
    end

    def delete(path)
      return unless exists?(path)
      File.delete("#{base_path}#{path}")
    end

    def exists?(path)
      File.exist?("#{base_path}#{path}")
    end

    def get(path, &)
      File.open("#{base_path}#{path}", "r", binmode: true, &)
    end

    def put(path, io)
      temp = "#{base_path}#{path}-#{SecureRandom.uuid}.tmp"

      FileUtils.mkdir_p(File.dirname(temp))
      io.rewind
      bytes_copied = IO.copy_stream(io, temp)
      raise("store failed: #{bytes_copied}/#{io.size} bytes copied") if bytes_copied != io.size

      FileUtils.chmod(DEFAULT_PERMISSIONS, temp)
      File.rename(temp, "#{base_path}#{path}")
    rescue StandardError => e
      FileUtils.rm_f(temp)
      raise(e)
    ensure
      FileUtils.rm_f(temp) if temp
    end

    def upload(path, body)
      put(path, body)
      "#{base_url}#{path}"
    end

    def url_for(entry)
      "#{base_url}#{entry.path}"
    end
  end
end